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| author | Fabio Estevam <fabio.estevam@freescale.com> | 2014-01-29 17:39:49 -0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-02-11 11:24:12 +0100 |
| commit | 6d73c23410cd0f8a54227dd0361fb8b9eadcb4b2 (patch) | |
| tree | 6e1b31648037762e47c487b94a271c14789d5c69 /arch/arm/cpu/armv7 | |
| parent | 4702c62dce3e2e2648ae3c8d002202211de8c92a (diff) | |
| download | u-boot-imx-6d73c23410cd0f8a54227dd0361fb8b9eadcb4b2.zip u-boot-imx-6d73c23410cd0f8a54227dd0361fb8b9eadcb4b2.tar.gz u-boot-imx-6d73c23410cd0f8a54227dd0361fb8b9eadcb4b2.tar.bz2 | |
mx6: Enable L2 cache support
Add L2 cache support and enable it by default.
Configure the L2 cache in the same way as done by FSL kernel:
http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/tree/arch/arm/mach-mx6/mm.c?h=imx_3.0.35_4.1.0
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Dirk Behme <dirk.behme@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'arch/arm/cpu/armv7')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/soc.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c index 4c5c367..1725279 100644 --- a/arch/arm/cpu/armv7/mx6/soc.c +++ b/arch/arm/cpu/armv7/mx6/soc.c @@ -8,6 +8,8 @@ */ #include <common.h> +#include <asm/armv7.h> +#include <asm/pl310.h> #include <asm/errno.h> #include <asm/io.h> #include <asm/arch/imx-regs.h> @@ -375,3 +377,59 @@ void imx_setup_hdmi(void) writel(reg, &mxc_ccm->chsccdr); } #endif + +#ifndef CONFIG_SYS_L2CACHE_OFF +#define IOMUXC_GPR11_L2CACHE_AS_OCRAM 0x00000002 +void v7_outer_cache_enable(void) +{ + struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE; + unsigned int val; + +#if defined CONFIG_MX6SL + struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR; + val = readl(&iomux->gpr[11]); + if (val & IOMUXC_GPR11_L2CACHE_AS_OCRAM) { + /* L2 cache configured as OCRAM, reset it */ + val &= ~IOMUXC_GPR11_L2CACHE_AS_OCRAM; + writel(val, &iomux->gpr[11]); + } +#endif + + writel(0x132, &pl310->pl310_tag_latency_ctrl); + writel(0x132, &pl310->pl310_data_latency_ctrl); + + val = readl(&pl310->pl310_prefetch_ctrl); + + /* Turn on the L2 I/D prefetch */ + val |= 0x30000000; + + /* + * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0 + * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2 + * But according to ARM PL310 errata: 752271 + * ID: 752271: Double linefill feature can cause data corruption + * Fault Status: Present in: r3p0, r3p1, r3p1-50rel0. Fixed in r3p2 + * Workaround: The only workaround to this erratum is to disable the + * double linefill feature. This is the default behavior. + */ + +#ifndef CONFIG_MX6Q + val |= 0x40800000; +#endif + writel(val, &pl310->pl310_prefetch_ctrl); + + val = readl(&pl310->pl310_power_ctrl); + val |= L2X0_DYNAMIC_CLK_GATING_EN; + val |= L2X0_STNDBY_MODE_EN; + writel(val, &pl310->pl310_power_ctrl); + + setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); +} + +void v7_outer_cache_disable(void) +{ + struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE; + + clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); +} +#endif /* !CONFIG_SYS_L2CACHE_OFF */ |